physical science
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. How much heat must be added to 1.0 kg of water at 100 oC to convert it to steam at 100 oC?
How much heat in kcal must be added to 0.31 kg of water at room temperature (20°C) to raise its temperature to 32°C?
How much heat is required to convert 18.0 grams of water at -5oC to steam at 120oC.
5) How much heat is required to convert 0.05kg of water at 298 K to super-steam at 423 K. The boiling point of water is 373 K. Cm [H2O (l)] = 75.4 J/(mol. ℃) Cm [H2O (g)] = 33.6 J/(mol. ℃) ΔHvap = 40.67 75.4 J/mol
How much heat in joules must be added to 0.797 kg of beryllium to change it from a solid at 890°C to a liquid at 1285°C (its melting point)? For beryllium: 14 = 1.35x106J/kg, Ly = 3.24x107J/kg, c = 1820 J/kg Cº Number: Units:
How much heat required to convert 36 grams (2 moles) of liquid water at 4.0 oC to liquid water at 50 oC? The delta-H of fusion for H2O is 6.02 kJ/mol and the heat capacity of liquid water is 4.18 J/goC A) 36 kJ B) 12.04 kJ C) 8.36 kJ D) 4.18 kJ E) 6.9 kJ
4. How much energy is needed to convert 64.09 grams of water at 100.°C to steam at 128.40 °C? specific heat (steam) = 2.09 J/g°C specific heat (water) = 4.18 J/g°C heat of fusion = 6.02 kJ/mol heat of vaporization = 40.6 kJ/mol 144.42 kJ 25.21 kJ 152.03 kJ 3.80 kJ 148.23 kJ 5. The charges with sodium chloride are all balanced-for every positive sodium ion there is a corresponding negative chloride ion. Since its charges...
1. How much heat will be lost by 20 g of steam at 108 oC to transform into 20 g of water at 31 oC. (cice= 2.05 kJ/kg, cwater=4.18 kJ*K/kg, csteam=2.01 kJ*K/kg; Lfwater=333.5 kJ/kg @ 0 oC, Lvwater= 2257 kJ/kg @100 oC) Q= J 2. A 60 g mass of copper at 960 oC is dropped into 325 g of water at 20 oC and allowed to come to thermal equilibrium. What will the final temperature be? (cice= 2.05 kJ/kg,...
How much heat energy in joules must be added to 78 grams of water initially at 23 degrees Celsius if it ends up at 53 degrees Celsius. Remember that the specific heat capacity of water = 4186 J/ (kg oC) or 1 calorie / (g oC)
How much heat must be added to 0.45 kg of aluminum to change it from its solid state at 130℃ to the liquid state at 660℃ (its melting point)? The latent heat of fusion of aluminum is 4.0 x 105J / kg.
What mass of steam at 100℃ must be added to 1.40 kg of ice at 0℃ to yield liquid water at 19℃? The heat of fusion for water is 333 kJ/kg, the specific heat is 4186 J/kg·℃ the heat of vaporization is 2260 kJ/kg.